Sidi Women's Genius 5.5 Carbon Cycling Shoe 100% Lorica and mesh Synthetic sole Patented Full Carbon Sole balances power transfer and foot health for the high-performance, high-mileage cyclist Breathable, supple, durable Lorica Microfiber upper with cooling mesh inserts Caliper buckle for easy on-the-bike fit adjustment Soft Instep closure system and padded tongue eliminate pressure points High Security Velcro won't shift or slip